{{ message }}
forked from python/cpython
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathunicodeobject.h
More file actions
759 lines (622 loc) · 26.7 KB
/
Copy pathunicodeobject.h
File metadata and controls
759 lines (622 loc) · 26.7 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
#ifndef Py_CPYTHON_UNICODEOBJECT_H
# error "this header file must not be included directly"
#endif
/* Py_UNICODE was the native Unicode storage format (code unit) used by
Python and represents a single Unicode element in the Unicode type.
With PEP 393, Py_UNICODE is deprecated and replaced with a
typedef to wchar_t. */
Py_DEPRECATED(3.13) typedef wchar_t PY_UNICODE_TYPE;
Py_DEPRECATED(3.13) typedef wchar_t Py_UNICODE;
/* --- Internal Unicode Operations ---------------------------------------- */
// Static inline functions to work with surrogates
static inline int Py_UNICODE_IS_SURROGATE(Py_UCS4 ch) {
return (0xD800 <= ch && ch <= 0xDFFF);
}
static inline int Py_UNICODE_IS_HIGH_SURROGATE(Py_UCS4 ch) {
return (0xD800 <= ch && ch <= 0xDBFF);
}
static inline int Py_UNICODE_IS_LOW_SURROGATE(Py_UCS4 ch) {
return (0xDC00 <= ch && ch <= 0xDFFF);
}
// Join two surrogate characters and return a single Py_UCS4 value.
static inline Py_UCS4 Py_UNICODE_JOIN_SURROGATES(Py_UCS4 high, Py_UCS4 low) {
assert(Py_UNICODE_IS_HIGH_SURROGATE(high));
assert(Py_UNICODE_IS_LOW_SURROGATE(low));
return 0x10000 + (((high & 0x03FF) << 10) | (low & 0x03FF));
}
// High surrogate = top 10 bits added to 0xD800.
// The character must be in the range [U+10000; U+10ffff].
static inline Py_UCS4 Py_UNICODE_HIGH_SURROGATE(Py_UCS4 ch) {
assert(0x10000 <= ch && ch <= 0x10ffff);
return (0xD800 - (0x10000 >> 10) + (ch >> 10));
}
// Low surrogate = bottom 10 bits added to 0xDC00.
// The character must be in the range [U+10000; U+10ffff].
static inline Py_UCS4 Py_UNICODE_LOW_SURROGATE(Py_UCS4 ch) {
assert(0x10000 <= ch && ch <= 0x10ffff);
return (0xDC00 + (ch & 0x3FF));
}
/* --- Unicode Type ------------------------------------------------------- */
/* ASCII-only strings created through PyUnicode_New use the PyASCIIObject
structure. state.ascii and state.compact are set, and the data
immediately follow the structure. utf8_length can be found
in the length field; the utf8 pointer is equal to the data pointer. */
typedef struct {
/* There are 4 forms of Unicode strings:
- compact ascii:
* structure = PyASCIIObject
* test: PyUnicode_IS_COMPACT_ASCII(op)
* kind = PyUnicode_1BYTE_KIND
* compact = 1
* ascii = 1
* (length is the length of the utf8)
* (data starts just after the structure)
* (since ASCII is decoded from UTF-8, the utf8 string are the data)
- compact:
* structure = PyCompactUnicodeObject
* test: PyUnicode_IS_COMPACT(op) && !PyUnicode_IS_ASCII(op)
* kind = PyUnicode_1BYTE_KIND, PyUnicode_2BYTE_KIND or
PyUnicode_4BYTE_KIND
* compact = 1
* ascii = 0
* utf8 is not shared with data
* utf8_length = 0 if utf8 is NULL
* (data starts just after the structure)
- legacy string:
* structure = PyUnicodeObject structure
* test: !PyUnicode_IS_COMPACT(op)
* kind = PyUnicode_1BYTE_KIND, PyUnicode_2BYTE_KIND or
PyUnicode_4BYTE_KIND
* compact = 0
* data.any is not NULL
* utf8 is shared and utf8_length = length with data.any if ascii = 1
* utf8_length = 0 if utf8 is NULL
Compact strings use only one memory block (structure + characters),
whereas legacy strings use one block for the structure and one block
for characters.
Legacy strings are created by subclasses of Unicode.
See also _PyUnicode_CheckConsistency().
*/
PyObject_HEAD
Py_ssize_t length; /* Number of code points in the string */
Py_hash_t hash; /* Hash value; -1 if not set */
struct {
/* If interned is non-zero, the two references from the
dictionary to this object are *not* counted in ob_refcnt.
The possible values here are:
0: Not Interned
1: Interned
2: Interned and Immortal
3: Interned, Immortal, and Static
This categorization allows the runtime to determine the right
cleanup mechanism at runtime shutdown. */
uint16_t interned;
/* Character size:
- PyUnicode_1BYTE_KIND (1):
* character type = Py_UCS1 (8 bits, unsigned)
* all characters are in the range U+0000-U+00FF (latin1)
* if ascii is set, all characters are in the range U+0000-U+007F
(ASCII), otherwise at least one character is in the range
U+0080-U+00FF
- PyUnicode_2BYTE_KIND (2):
* character type = Py_UCS2 (16 bits, unsigned)
* all characters are in the range U+0000-U+FFFF (BMP)
* at least one character is in the range U+0100-U+FFFF
- PyUnicode_4BYTE_KIND (4):
* character type = Py_UCS4 (32 bits, unsigned)
* all characters are in the range U+0000-U+10FFFF
* at least one character is in the range U+10000-U+10FFFF
*/
unsigned short kind:3;
/* Compact is with respect to the allocation scheme. Compact unicode
objects only require one memory block while non-compact objects use
one block for the PyUnicodeObject struct and another for its data
buffer. */
unsigned short compact:1;
/* The string only contains characters in the range U+0000-U+007F (ASCII)
and the kind is PyUnicode_1BYTE_KIND. If ascii is set and compact is
set, use the PyASCIIObject structure. */
unsigned short ascii:1;
/* The object is statically allocated. */
unsigned short statically_allocated:1;
/* Padding to ensure that PyUnicode_DATA() is always aligned to
4 bytes (see issue #19537 on m68k) and we use unsigned short to avoid
the extra four bytes on 32-bit Windows. This is restricted features
for specific compilers including GCC, MSVC, Clang and IBM's XL compiler. */
unsigned short :10;
} state;
} PyASCIIObject;
/* Non-ASCII strings allocated through PyUnicode_New use the
PyCompactUnicodeObject structure. state.compact is set, and the data
immediately follow the structure. */
typedef struct {
PyASCIIObject _base;
Py_ssize_t utf8_length; /* Number of bytes in utf8, excluding the
* terminating \0. */
char *utf8; /* UTF-8 representation (null-terminated) */
} PyCompactUnicodeObject;
/* Object format for Unicode subclasses. */
typedef struct {
PyCompactUnicodeObject _base;
union {
void *any;
Py_UCS1 *latin1;
Py_UCS2 *ucs2;
Py_UCS4 *ucs4;
} data; /* Canonical, smallest-form Unicode buffer */
} PyUnicodeObject;
#define _PyASCIIObject_CAST(op) \
(assert(PyUnicode_Check(op)), \
_Py_CAST(PyASCIIObject*, (op)))
#define _PyCompactUnicodeObject_CAST(op) \
(assert(PyUnicode_Check(op)), \
_Py_CAST(PyCompactUnicodeObject*, (op)))
#define _PyUnicodeObject_CAST(op) \
(assert(PyUnicode_Check(op)), \
_Py_CAST(PyUnicodeObject*, (op)))
/* --- Flexible String Representation Helper Macros (PEP 393) -------------- */
/* Values for PyASCIIObject.state: */
/* Interning state. */
#define SSTATE_NOT_INTERNED 0
#define SSTATE_INTERNED_MORTAL 1
#define SSTATE_INTERNED_IMMORTAL 2
#define SSTATE_INTERNED_IMMORTAL_STATIC 3
/* Use only if you know it's a string */
static inline unsigned int PyUnicode_CHECK_INTERNED(PyObject *op) {
#ifdef Py_GIL_DISABLED
return _Py_atomic_load_uint16_relaxed(&_PyASCIIObject_CAST(op)->state.interned);
#else
return _PyASCIIObject_CAST(op)->state.interned;
#endif
}
#define PyUnicode_CHECK_INTERNED(op) PyUnicode_CHECK_INTERNED(_PyObject_CAST(op))
/* For backward compatibility. Soft-deprecated. */
static inline unsigned int PyUnicode_IS_READY(PyObject* Py_UNUSED(op)) {
return 1;
}
#define PyUnicode_IS_READY(op) PyUnicode_IS_READY(_PyObject_CAST(op))
/* Return true if the string contains only ASCII characters, or 0 if not. The
string may be compact (PyUnicode_IS_COMPACT_ASCII) or not. */
static inline unsigned int PyUnicode_IS_ASCII(PyObject *op) {
return _PyASCIIObject_CAST(op)->state.ascii;
}
#define PyUnicode_IS_ASCII(op) PyUnicode_IS_ASCII(_PyObject_CAST(op))
/* Return true if the string is compact or 0 if not.
No type checks are performed. */
static inline unsigned int PyUnicode_IS_COMPACT(PyObject *op) {
return _PyASCIIObject_CAST(op)->state.compact;
}
#define PyUnicode_IS_COMPACT(op) PyUnicode_IS_COMPACT(_PyObject_CAST(op))
/* Return true if the string is a compact ASCII string (use PyASCIIObject
structure), or 0 if not. No type checks are performed. */
static inline int PyUnicode_IS_COMPACT_ASCII(PyObject *op) {
return (_PyASCIIObject_CAST(op)->state.ascii && PyUnicode_IS_COMPACT(op));
}
#define PyUnicode_IS_COMPACT_ASCII(op) PyUnicode_IS_COMPACT_ASCII(_PyObject_CAST(op))
enum PyUnicode_Kind {
/* Return values of the PyUnicode_KIND() function: */
PyUnicode_1BYTE_KIND = 1,
PyUnicode_2BYTE_KIND = 2,
PyUnicode_4BYTE_KIND = 4
};
PyAPI_FUNC(int) PyUnicode_KIND(PyObject *op);
// PyUnicode_KIND(): Return one of the PyUnicode_*_KIND values defined above.
//
// gh-89653: Converting this macro to a static inline function would introduce
// new compiler warnings on "kind < PyUnicode_KIND(str)" (compare signed and
// unsigned numbers) where kind type is an int or on
// "unsigned int kind = PyUnicode_KIND(str)" (cast signed to unsigned).
#define PyUnicode_KIND(op) _Py_RVALUE(_PyASCIIObject_CAST(op)->state.kind)
/* Return a void pointer to the raw unicode buffer. */
static inline void* _PyUnicode_COMPACT_DATA(PyObject *op) {
if (PyUnicode_IS_ASCII(op)) {
return _Py_STATIC_CAST(void*, (_PyASCIIObject_CAST(op) + 1));
}
return _Py_STATIC_CAST(void*, (_PyCompactUnicodeObject_CAST(op) + 1));
}
static inline void* _PyUnicode_NONCOMPACT_DATA(PyObject *op) {
void *data;
assert(!PyUnicode_IS_COMPACT(op));
data = _PyUnicodeObject_CAST(op)->data.any;
assert(data != NULL);
return data;
}
PyAPI_FUNC(void*) PyUnicode_DATA(PyObject *op);
static inline void* _PyUnicode_DATA(PyObject *op) {
if (PyUnicode_IS_COMPACT(op)) {
return _PyUnicode_COMPACT_DATA(op);
}
return _PyUnicode_NONCOMPACT_DATA(op);
}
#define PyUnicode_DATA(op) _PyUnicode_DATA(_PyObject_CAST(op))
/* Return pointers to the canonical representation cast to unsigned char,
Py_UCS2, or Py_UCS4 for direct character access.
No checks are performed, use PyUnicode_KIND() before to ensure
these will work correctly. */
#define PyUnicode_1BYTE_DATA(op) _Py_STATIC_CAST(Py_UCS1*, PyUnicode_DATA(op))
#define PyUnicode_2BYTE_DATA(op) _Py_STATIC_CAST(Py_UCS2*, PyUnicode_DATA(op))
#define PyUnicode_4BYTE_DATA(op) _Py_STATIC_CAST(Py_UCS4*, PyUnicode_DATA(op))
/* Returns the length of the unicode string. */
static inline Py_ssize_t PyUnicode_GET_LENGTH(PyObject *op) {
return _PyASCIIObject_CAST(op)->length;
}
#define PyUnicode_GET_LENGTH(op) PyUnicode_GET_LENGTH(_PyObject_CAST(op))
/* Write into the canonical representation, this function does not do any sanity
checks and is intended for usage in loops. The caller should cache the
kind and data pointers obtained from other function calls.
index is the index in the string (starts at 0) and value is the new
code point value which should be written to that location. */
static inline void PyUnicode_WRITE(int kind, void *data,
Py_ssize_t index, Py_UCS4 value)
{
assert(index >= 0);
if (kind == PyUnicode_1BYTE_KIND) {
assert(value <= 0xffU);
_Py_STATIC_CAST(Py_UCS1*, data)[index] = _Py_STATIC_CAST(Py_UCS1, value);
}
else if (kind == PyUnicode_2BYTE_KIND) {
assert(value <= 0xffffU);
_Py_STATIC_CAST(Py_UCS2*, data)[index] = _Py_STATIC_CAST(Py_UCS2, value);
}
else {
assert(kind == PyUnicode_4BYTE_KIND);
assert(value <= 0x10ffffU);
_Py_STATIC_CAST(Py_UCS4*, data)[index] = value;
}
}
#define PyUnicode_WRITE(kind, data, index, value) \
PyUnicode_WRITE(_Py_STATIC_CAST(int, kind), _Py_CAST(void*, data), \
(index), _Py_STATIC_CAST(Py_UCS4, value))
/* Read a code point from the string's canonical representation. No checks
are performed. */
static inline Py_UCS4 PyUnicode_READ(int kind,
const void *data, Py_ssize_t index)
{
assert(index >= 0);
if (kind == PyUnicode_1BYTE_KIND) {
return _Py_STATIC_CAST(const Py_UCS1*, data)[index];
}
if (kind == PyUnicode_2BYTE_KIND) {
return _Py_STATIC_CAST(const Py_UCS2*, data)[index];
}
assert(kind == PyUnicode_4BYTE_KIND);
return _Py_STATIC_CAST(const Py_UCS4*, data)[index];
}
#define PyUnicode_READ(kind, data, index) \
PyUnicode_READ(_Py_STATIC_CAST(int, kind), \
_Py_STATIC_CAST(const void*, data), \
(index))
/* PyUnicode_READ_CHAR() is less efficient than PyUnicode_READ() because it
calls PyUnicode_KIND() and might call it twice. For single reads, use
PyUnicode_READ_CHAR, for multiple consecutive reads callers should
cache kind and use PyUnicode_READ instead. */
static inline Py_UCS4 PyUnicode_READ_CHAR(PyObject *unicode, Py_ssize_t index)
{
int kind;
assert(index >= 0);
// Tolerate reading the NUL character at str[len(str)]
assert(index <= PyUnicode_GET_LENGTH(unicode));
kind = PyUnicode_KIND(unicode);
if (kind == PyUnicode_1BYTE_KIND) {
return PyUnicode_1BYTE_DATA(unicode)[index];
}
if (kind == PyUnicode_2BYTE_KIND) {
return PyUnicode_2BYTE_DATA(unicode)[index];
}
assert(kind == PyUnicode_4BYTE_KIND);
return PyUnicode_4BYTE_DATA(unicode)[index];
}
#define PyUnicode_READ_CHAR(unicode, index) \
PyUnicode_READ_CHAR(_PyObject_CAST(unicode), (index))
/* Return a maximum character value which is suitable for creating another
string based on op. This is always an approximation but more efficient
than iterating over the string. */
static inline Py_UCS4 PyUnicode_MAX_CHAR_VALUE(PyObject *op)
{
int kind;
if (PyUnicode_IS_ASCII(op)) {
return 0x7fU;
}
kind = PyUnicode_KIND(op);
if (kind == PyUnicode_1BYTE_KIND) {
return 0xffU;
}
if (kind == PyUnicode_2BYTE_KIND) {
return 0xffffU;
}
assert(kind == PyUnicode_4BYTE_KIND);
return 0x10ffffU;
}
#define PyUnicode_MAX_CHAR_VALUE(op) \
PyUnicode_MAX_CHAR_VALUE(_PyObject_CAST(op))
/* === Public API ========================================================= */
/* With PEP 393, this is the recommended way to allocate a new unicode object.
This function will allocate the object and its buffer in a single memory
block. Objects created using this function are not resizable. */
PyAPI_FUNC(PyObject*) PyUnicode_New(
Py_ssize_t size, /* Number of code points in the new string */
Py_UCS4 maxchar /* maximum code point value in the string */
);
/* For backward compatibility. Soft-deprecated. */
static inline int PyUnicode_READY(PyObject* Py_UNUSED(op))
{
return 0;
}
#define PyUnicode_READY(op) PyUnicode_READY(_PyObject_CAST(op))
/* Copy character from one unicode object into another, this function performs
character conversion when necessary and falls back to memcpy() if possible.
Fail if to is too small (smaller than *how_many* or smaller than
len(from)-from_start), or if kind(from[from_start:from_start+how_many]) >
kind(to), or if *to* has more than 1 reference.
Return the number of written character, or return -1 and raise an exception
on error.
Pseudo-code:
how_many = min(how_many, len(from) - from_start)
to[to_start:to_start+how_many] = from[from_start:from_start+how_many]
return how_many
Note: The function doesn't write a terminating null character.
*/
PyAPI_FUNC(Py_ssize_t) PyUnicode_CopyCharacters(
PyObject *to,
Py_ssize_t to_start,
PyObject *from,
Py_ssize_t from_start,
Py_ssize_t how_many
);
/* Fill a string with a character: write fill_char into
unicode[start:start+length].
Fail if fill_char is bigger than the string maximum character, or if the
string has more than 1 reference.
Return the number of written character, or return -1 and raise an exception
on error. */
PyAPI_FUNC(Py_ssize_t) PyUnicode_Fill(
PyObject *unicode,
Py_ssize_t start,
Py_ssize_t length,
Py_UCS4 fill_char
);
/* Create a new string from a buffer of Py_UCS1, Py_UCS2 or Py_UCS4 characters.
Scan the string to find the maximum character. */
PyAPI_FUNC(PyObject*) PyUnicode_FromKindAndData(
int kind,
const void *buffer,
Py_ssize_t size);
/* --- Public PyUnicodeWriter API ----------------------------------------- */
typedef struct PyUnicodeWriter PyUnicodeWriter;
PyAPI_FUNC(PyUnicodeWriter*) PyUnicodeWriter_Create(Py_ssize_t length);
PyAPI_FUNC(void) PyUnicodeWriter_Discard(PyUnicodeWriter *writer);
PyAPI_FUNC(PyObject*) PyUnicodeWriter_Finish(PyUnicodeWriter *writer);
PyAPI_FUNC(int) PyUnicodeWriter_WriteChar(
PyUnicodeWriter *writer,
Py_UCS4 ch);
PyAPI_FUNC(int) PyUnicodeWriter_WriteUTF8(
PyUnicodeWriter *writer,
const char *str,
Py_ssize_t size);
PyAPI_FUNC(int) PyUnicodeWriter_WriteWideChar(
PyUnicodeWriter *writer,
const wchar_t *str,
Py_ssize_t size);
PyAPI_FUNC(int) PyUnicodeWriter_WriteUCS4(
PyUnicodeWriter *writer,
Py_UCS4 *str,
Py_ssize_t size);
PyAPI_FUNC(int) PyUnicodeWriter_WriteStr(
PyUnicodeWriter *writer,
PyObject *obj);
PyAPI_FUNC(int) PyUnicodeWriter_WriteRepr(
PyUnicodeWriter *writer,
PyObject *obj);
PyAPI_FUNC(int) PyUnicodeWriter_WriteSubstring(
PyUnicodeWriter *writer,
PyObject *str,
Py_ssize_t start,
Py_ssize_t end);
PyAPI_FUNC(int) PyUnicodeWriter_Format(
PyUnicodeWriter *writer,
const char *format,
...);
PyAPI_FUNC(int) PyUnicodeWriter_DecodeUTF8Stateful(
PyUnicodeWriter *writer,
const char *string, /* UTF-8 encoded string */
Py_ssize_t length, /* size of string */
const char *errors, /* error handling */
Py_ssize_t *consumed); /* bytes consumed */
/* --- Private _PyUnicodeWriter API --------------------------------------- */
typedef struct {
PyObject *buffer;
void *data;
int kind;
Py_UCS4 maxchar;
Py_ssize_t size;
Py_ssize_t pos;
/* minimum number of allocated characters (default: 0) */
Py_ssize_t min_length;
/* minimum character (default: 127, ASCII) */
Py_UCS4 min_char;
/* If non-zero, overallocate the buffer (default: 0). */
unsigned char overallocate;
/* If readonly is 1, buffer is a shared string (cannot be modified)
and size is set to 0. */
unsigned char readonly;
} _PyUnicodeWriter;
// Initialize a Unicode writer.
//
// By default, the minimum buffer size is 0 character and overallocation is
// disabled. Set min_length, min_char and overallocate attributes to control
// the allocation of the buffer.
_Py_DEPRECATED_EXTERNALLY(3.14) PyAPI_FUNC(void) _PyUnicodeWriter_Init(
_PyUnicodeWriter *writer);
/* Prepare the buffer to write 'length' characters
with the specified maximum character.
Return 0 on success, raise an exception and return -1 on error. */
#define _PyUnicodeWriter_Prepare(WRITER, LENGTH, MAXCHAR) \
(((MAXCHAR) <= (WRITER)->maxchar \
&& (LENGTH) <= (WRITER)->size - (WRITER)->pos) \
? 0 \
: (((LENGTH) == 0) \
? 0 \
: _PyUnicodeWriter_PrepareInternal((WRITER), (LENGTH), (MAXCHAR))))
/* Don't call this function directly, use the _PyUnicodeWriter_Prepare() macro
instead. */
_Py_DEPRECATED_EXTERNALLY(3.14) PyAPI_FUNC(int) _PyUnicodeWriter_PrepareInternal(
_PyUnicodeWriter *writer,
Py_ssize_t length,
Py_UCS4 maxchar);
/* Prepare the buffer to have at least the kind KIND.
For example, kind=PyUnicode_2BYTE_KIND ensures that the writer will
support characters in range U+000-U+FFFF.
Return 0 on success, raise an exception and return -1 on error. */
#define _PyUnicodeWriter_PrepareKind(WRITER, KIND) \
((KIND) <= (WRITER)->kind \
? 0 \
: _PyUnicodeWriter_PrepareKindInternal((WRITER), (KIND)))
/* Don't call this function directly, use the _PyUnicodeWriter_PrepareKind()
macro instead. */
_Py_DEPRECATED_EXTERNALLY(3.14) PyAPI_FUNC(int) _PyUnicodeWriter_PrepareKindInternal(
_PyUnicodeWriter *writer,
int kind);
/* Append a Unicode character.
Return 0 on success, raise an exception and return -1 on error. */
_Py_DEPRECATED_EXTERNALLY(3.14) PyAPI_FUNC(int) _PyUnicodeWriter_WriteChar(
_PyUnicodeWriter *writer,
Py_UCS4 ch);
/* Append a Unicode string.
Return 0 on success, raise an exception and return -1 on error. */
_Py_DEPRECATED_EXTERNALLY(3.14) PyAPI_FUNC(int) _PyUnicodeWriter_WriteStr(
_PyUnicodeWriter *writer,
PyObject *str); /* Unicode string */
/* Append a substring of a Unicode string.
Return 0 on success, raise an exception and return -1 on error. */
_Py_DEPRECATED_EXTERNALLY(3.14) PyAPI_FUNC(int) _PyUnicodeWriter_WriteSubstring(
_PyUnicodeWriter *writer,
PyObject *str, /* Unicode string */
Py_ssize_t start,
Py_ssize_t end);
/* Append an ASCII-encoded byte string.
Return 0 on success, raise an exception and return -1 on error. */
_Py_DEPRECATED_EXTERNALLY(3.14) PyAPI_FUNC(int) _PyUnicodeWriter_WriteASCIIString(
_PyUnicodeWriter *writer,
const char *str, /* ASCII-encoded byte string */
Py_ssize_t len); /* number of bytes, or -1 if unknown */
/* Append a latin1-encoded byte string.
Return 0 on success, raise an exception and return -1 on error. */
_Py_DEPRECATED_EXTERNALLY(3.14) PyAPI_FUNC(int) _PyUnicodeWriter_WriteLatin1String(
_PyUnicodeWriter *writer,
const char *str, /* latin1-encoded byte string */
Py_ssize_t len); /* length in bytes */
/* Get the value of the writer as a Unicode string. Clear the
buffer of the writer. Raise an exception and return NULL
on error. */
_Py_DEPRECATED_EXTERNALLY(3.14) PyAPI_FUNC(PyObject *) _PyUnicodeWriter_Finish(
_PyUnicodeWriter *writer);
/* Deallocate memory of a writer (clear its internal buffer). */
_Py_DEPRECATED_EXTERNALLY(3.14) PyAPI_FUNC(void) _PyUnicodeWriter_Dealloc(
_PyUnicodeWriter *writer);
/* --- Manage the default encoding ---------------------------------------- */
/* Returns a pointer to the default encoding (UTF-8) of the
Unicode object unicode.
Like PyUnicode_AsUTF8AndSize(), this also caches the UTF-8 representation
in the unicodeobject.
_PyUnicode_AsString is a #define for PyUnicode_AsUTF8 to
support the previous internal function with the same behaviour.
Use of this API is DEPRECATED since no size information can be
extracted from the returned data.
*/
PyAPI_FUNC(const char *) PyUnicode_AsUTF8(PyObject *unicode);
// Deprecated alias kept for backward compatibility
Py_DEPRECATED(3.14) static inline const char*
_PyUnicode_AsString(PyObject *unicode)
{
return PyUnicode_AsUTF8(unicode);
}
/* === Characters Type APIs =============================================== */
/* These should not be used directly. Use the Py_UNICODE_IS* and
Py_UNICODE_TO* macros instead.
These APIs are implemented in Objects/unicodectype.c.
*/
PyAPI_FUNC(int) _PyUnicode_IsLowercase(
Py_UCS4 ch /* Unicode character */
);
PyAPI_FUNC(int) _PyUnicode_IsUppercase(
Py_UCS4 ch /* Unicode character */
);
PyAPI_FUNC(int) _PyUnicode_IsTitlecase(
Py_UCS4 ch /* Unicode character */
);
PyAPI_FUNC(int) _PyUnicode_IsWhitespace(
const Py_UCS4 ch /* Unicode character */
);
PyAPI_FUNC(int) _PyUnicode_IsLinebreak(
const Py_UCS4 ch /* Unicode character */
);
PyAPI_FUNC(Py_UCS4) _PyUnicode_ToLowercase(
Py_UCS4 ch /* Unicode character */
);
PyAPI_FUNC(Py_UCS4) _PyUnicode_ToUppercase(
Py_UCS4 ch /* Unicode character */
);
PyAPI_FUNC(Py_UCS4) _PyUnicode_ToTitlecase(
Py_UCS4 ch /* Unicode character */
);
PyAPI_FUNC(int) _PyUnicode_ToDecimalDigit(
Py_UCS4 ch /* Unicode character */
);
PyAPI_FUNC(int) _PyUnicode_ToDigit(
Py_UCS4 ch /* Unicode character */
);
PyAPI_FUNC(double) _PyUnicode_ToNumeric(
Py_UCS4 ch /* Unicode character */
);
PyAPI_FUNC(int) _PyUnicode_IsDecimalDigit(
Py_UCS4 ch /* Unicode character */
);
PyAPI_FUNC(int) _PyUnicode_IsDigit(
Py_UCS4 ch /* Unicode character */
);
PyAPI_FUNC(int) _PyUnicode_IsNumeric(
Py_UCS4 ch /* Unicode character */
);
PyAPI_FUNC(int) _PyUnicode_IsPrintable(
Py_UCS4 ch /* Unicode character */
);
PyAPI_FUNC(int) _PyUnicode_IsAlpha(
Py_UCS4 ch /* Unicode character */
);
// Helper array used by Py_UNICODE_ISSPACE().
PyAPI_DATA(const unsigned char) _Py_ascii_whitespace[];
// Since splitting on whitespace is an important use case, and
// whitespace in most situations is solely ASCII whitespace, we
// optimize for the common case by using a quick look-up table
// _Py_ascii_whitespace (see below) with an inlined check.
static inline int Py_UNICODE_ISSPACE(Py_UCS4 ch) {
if (ch < 128) {
return _Py_ascii_whitespace[ch];
}
return _PyUnicode_IsWhitespace(ch);
}
#define Py_UNICODE_ISLOWER(ch) _PyUnicode_IsLowercase(ch)
#define Py_UNICODE_ISUPPER(ch) _PyUnicode_IsUppercase(ch)
#define Py_UNICODE_ISTITLE(ch) _PyUnicode_IsTitlecase(ch)
#define Py_UNICODE_ISLINEBREAK(ch) _PyUnicode_IsLinebreak(ch)
#define Py_UNICODE_TOLOWER(ch) _PyUnicode_ToLowercase(ch)
#define Py_UNICODE_TOUPPER(ch) _PyUnicode_ToUppercase(ch)
#define Py_UNICODE_TOTITLE(ch) _PyUnicode_ToTitlecase(ch)
#define Py_UNICODE_ISDECIMAL(ch) _PyUnicode_IsDecimalDigit(ch)
#define Py_UNICODE_ISDIGIT(ch) _PyUnicode_IsDigit(ch)
#define Py_UNICODE_ISNUMERIC(ch) _PyUnicode_IsNumeric(ch)
#define Py_UNICODE_ISPRINTABLE(ch) _PyUnicode_IsPrintable(ch)
#define Py_UNICODE_TODECIMAL(ch) _PyUnicode_ToDecimalDigit(ch)
#define Py_UNICODE_TODIGIT(ch) _PyUnicode_ToDigit(ch)
#define Py_UNICODE_TONUMERIC(ch) _PyUnicode_ToNumeric(ch)
#define Py_UNICODE_ISALPHA(ch) _PyUnicode_IsAlpha(ch)
static inline int Py_UNICODE_ISALNUM(Py_UCS4 ch) {
return (Py_UNICODE_ISALPHA(ch)
|| Py_UNICODE_ISDECIMAL(ch)
|| Py_UNICODE_ISDIGIT(ch)
|| Py_UNICODE_ISNUMERIC(ch));
}
/* === Misc functions ===================================================== */
// Return an interned Unicode object for an Identifier; may fail if there is no
// memory.
PyAPI_FUNC(PyObject*) _PyUnicode_FromId(_Py_Identifier*);
You can’t perform that action at this time.